Among the ancient calligraphers in China, "Yan, Liu, Ou and Zhao" are also called "four masters of regular script". What are their names and dynasties?

Ou Yangxun (European Style) in Tang Dynasty: Regular script is rigorous and precipitous, and is praised as "the first regular script in Tang Dynasty" by the world, with its masterpiece "The Ritual Spring Inscription in Jiucheng Palace".

Yan Zhenqing in Tang Dynasty (Yan Ti): Regular script is dignified and majestic, known as "Yan Ti" in the world, and his masterpiece "Many Pagodas and Monuments".

Liu Gongquan (Liu Ti) in Tang Dynasty: His regular script is clean and vigorous, with rigorous structure, delicate brushwork and straight brushwork. He is known as "Liu Ti" in the world, and his masterpieces include Mysterious Tower Monument and Shence Army Monument.

Zhao Mengfu (Zhao Ti) in Yuan Dynasty: His regular script is round, delicate, correct and rigorous, but also elegant and beautiful. Known as "Zhao Ti" by the world, his masterpiece "Rebuilding the Three Storeys of the Xuandian".